Artificial porcelain root tooth



Nov. 11,1930. J. H. MQYER 1,780,979

ARTIFICIAL PORCELAIN ROOT TQOTH Fil.ed July 12, 1923 Patented Nov. 11,1930 UNITED STATES PATENT OFF JAMES H. MOYER OF GOILVUMBUS, 01110,AssIeNon To THE COLUMBUS nmv'm'r. MANU- rAorUnme'ooMPm, or COLUMBUS,OHIO, A conrona'rro v .ABTEIIFICIAL." FORCELAIN ROOT TOOTH Applicationfiled July 12, 1923. Serial No. b51346;

The objects of my invention are to provide an interchangeable artificialtooth having as "an integral part thereof an. artificial root,-

said root and tooth being made of porcelain or any othersuitablematerial. Also to pro- 'vide a certain combination of fasteningsfor attaching the tootht'o its backing, the said 1 novel combination offastenings being such that the tooth will lend itself readily to rmanufacture both in the molding and standardi'zation processes. I

' Heretofore the dentist has been obliged to add porcelain roots to:other types of teeth and 1fa'cings as -is supplied by] themanufacturers, which addition of said porcelain root requiredthat thedentist have excep-.

tional skill in theart of handling porcelain from its finely powderedstate toits glazed or fused state on-the said manufactured tooth orfacing. The dentist further was obliged to maintain an expensiveequipment for doing said porcelain work, together with the disadvantageof the consumption of much time both for the dentist and the patient.Some- 2 times the dentist sent his porcelain work to. a laboratory, saidlaboratory constructing the porcelain article according to the den--tists instructions. The latter method had many disadvantages in that thedentist was obliged to take with difliculty many accurate.

impressions, thus a hardship on both the V operator and the patient, andalthough the dentist gave hisinstructions carefully to the laboratory,there were many chances for error I r and'often the work was returnedtothe dentist very unsatisfactory. p -Whereas with my invention thedentist can procure a tooth that will approximatelyfit a given case,thenby asmall'amount of 40 grindin perfect the root to exact adaptation.

but glazedporcelain be in contact with the tissues, it. is a simpleoperation to add a small amount of low fusing porcelain as a veneer overthe said" ground'p'ortlon of'the nce it is imperative that nothing rootand bake said veneer to a glaze. It can readily be seen that this is atimesav er for the dentist and patient, andthedentist need not beskilled in the art of porcelain work to accomplish ideal results. lf-thet'dentist 'does not wish tomaintain' an expensive equipment he may havethe laboratory bake the veneer with equally as good results. Further,many teeth will not lend-themselves practically tothe processes fofstandardization. required in: manufacturing an interchangeableartificial porcelain tooth.

Since it is a fact that dental porcelaingshrinks,

warps and changes shape toa considerable extent during the bakingprocess it is necessary to grindto a standard-of interchanges abilityall of those surfaces of, the porcelain I ning true, it is obvious thatsimplicityin constructionof those parts of said tooth that come incontact with the metal backing must be rigidly adhered to. In my tooththere is but oneflat plane, one'post hole and one slot, all disposed insuch relation to each other that they lend themselves readily to thegrinding operations necessary to standardization and that these saidparts are of such shape and contour that they can be ground andmbaintaintherein an article truly interchangea le.. y v

In the drawing Fig. 1 isa side viewof an anterior tooth, Fig. 2 is aside View ofthe backing,

Fig. 3 is a lingual view of an anterior tooth, Fig. 4 is a perspectiveof an anteriortooth,

to abicuspid, l

,Fig. -6 is a side view of a modification of -7 i gperspectwe Of 3lIlOdlfiCittlOll 0 Fig.5 is the application ,of the invention "a backinghaving in cross section an oblong post. r V

In Fig; 1, numeral 1 is the crown portion of the artificial tooth, 2 isthe root portion of said tooth, 3 is a flat plane extending from a pointon the lingual surface of the tooth near *the juncture of the rootportion with'the crown portion in an incisal direction. Said flat planebeing divergent to'the long axis of the tooth and line Y, from theincisal edge portion toward the root portion of the tooth.

The post hole A may be a eylindrically V shapedfpos t hole havingitsorifice substantially' near the root end of the flat plane 3, X 991 s;3) end me l n y; disp e h rein:

' I The said post hole l extends from the said flat plane 3 to a pointsubstantially within the labial half of the tooth and may termi-i-v nateat or beyond the inner Wall 7 of the slot 5, and said post hole 4isof-one'diameter" thr h its ir leng h, t ax i ed yii sed bielly and infal y, a an e s e "boutf45i to the flat plane 3, yet it may enter theiQq lieet; n one angle to Said flat, Blane a ,Y

" The. sltifi s f teammate nth p ffh olelg tsee Fig.3) has parallelsides and is substantially triangular in longitudinal sec-" 7 tion. vOneleg of" the triangle substantially "F. a.

4,'thehy'potenuse substant ally coinc des with coincides with theperiphery of the post; hole thefiat'p'lane '3, the second leg? extendsfrom post tion said post being constructed either solid" or tubular, arib '9 and fiat member 11. This may be either a one piece or two piecebacklng.

Any modification of the shape of the post 8 will necessarily require asimilarly shaped 7 post hole 4 in the tooth. a

It may in some instances not'be necessary to grindthe fiat plane thefull width of the tooth in one dimension, because it is necessary duringthe molding of the toothj to, give a 'slight' draftto the {mold andthisfwill produce the" greatest width of the tooth t a more labial pointthan the lateral borders of i the flat plane. The fo ethe.flatlplanetmayextend; inione d mens onwzthe full Width of thetooth, or substantiallythe full width of theto'oth, hencewthe term full width in the -What"Iclaim claims will be'con'strued' accordingly. I

e1 wi li 0 t oth non and, from he 'iu i el v nd, o the 'l'ing u en en,

' 'lfa e :t foot: P ion near the mean of tller Ql0wnand 1"oo,t:p ortionsin the other dimen on, a post h f' xt idi; g.

flat plajne to afpoint within theliael I of the crown portion with axisdISQQSBd labially an'd 'inciisally at an angleto.

An, a tificial toe hphavingayrQote d n fl plane, and a slot triangularectionfl n' the 'CrQWIJ: p r i n comm With an T'OPQi liIi f ifoi tq aidffil b ough tK el fi ithQ h ypot u f the'f jri gl sa d-slot; a so com wth an i nine'i t s idl'p th out. the. ength 'Of' o l g f he tri ngle Anar ifiQi W hha i g a roo and a crow port onand a flatplane extending. t

a the. l rg i T he lnctur oft 7 hole 4 througljlmlt the entir le gt o tl l "Oheilggbf'th triangle. 7

" fFig 5 isthe posterior application showing a-bicujsid having a saddleeflectfi on the iroot' en the postjhole- 4, and; the inner wall 'asshownin'dottedlines. v a

i eiba king a show in F 2 c n i'ofi the" posit- 8 and: rib 9lwhich,integral; :fland the' flat plate or n embe'r'll'; the post 8' iscylindrically shaped ofone diameter and f may be' solidor tubular,therib 9 is formed as, an integral part of the 'post- 8. Thempost" 7-; oftheslot.may be; disposedeither equal;

' right angle,

to; greater than or less than. a

1 8 and 1 the rib 9 are made? to ffi' t 'respectively intdthepostiholefi 'aiia siqtis "or the-tooth,

and

Les i sea e rib-arer vae i ag roam Or;

F se mddiiiti slsh i iin aoneai backing having a tapered post and flat;

.. wee eed fieatieni: i; i v.'.a l"321,91 apa tB n: las

a d crown. pqr ioiisinlthe other. dime 1.15 .0 a

19 st; .11 me ding r m he.v s i flatplane ea p'o ntlw lth i th ab alhalflof e cmw with its. axis disposed, 'lab ifall'y and; inc'isaHy" d aSlot triat anJangIe tothe flatplana; a s-M r n longitudinal sec ion nthe p rti ns, n g Q'f t-he tria le; coin is with the periphery of the'post'hole, ,t; hv-l p t nus in iding th. he flat; plane; til

fi t i t b jthe FO Q D d mension l lene c nd iegex ending fr ma pointnear the n ie i e L nd .Qfthc. 190st oleing an angle .thretq 9 '7 aieqnt antia y W t. ,.1 the v n i al' ie-1f on thefl ai' z fi" t plane and;me-

d'ianly disposed therein, 7.

L l 1111;Wid h f. th 0 h intonee 1 and, r mt he inc s u; ndi' o' the; 11eii k surfac Qi t QJ 'Q Q near he i n; west ho ie' zi e ii 'g 1 ,11 t airfi plane m aipointiw hin he; ab halt lj -e-s wewi e all sa s A11: rt cio th ievi n afm fien "crow gpqlrt o d fla "plan iex. .end .ng

, nctur ores" r otai g ronn p t-. p hlmhe O m incisally at an angle tothe fiat plane, and a slot triangular in longitudinal section in thecrown portion, one le of the triangle coinciding with the perip ery ofthe post hole, the hypotenuse coinciding with the flat plane, the secondleg extending from a point near the innermost end of the post hole in anangle thereto to a point substantially Within the ineisal half on thesaid fiat plane and medianly disposed therein, and a backing for saidplane provided with a tenon complemental to the bore and slot.

In testimony whereof I affix my signature.

JAMES H. MOYER.

